U.S. Army on Russian Border

The Washington Post reported today that US military vehicles paraded 300 yards from the Russian border in Narva, Estonia.  You can see the evidence in this video - if you have doubts that it is the US Army then just fast forward to about 3:20 into it and you'll see old glory waving.

The soldiers from the US Army’s Second Cavalry Regiment will probably leave the military hardware in Estonia when they are finished with their "exercises".  This is usually how the Pentagon prepositions military equipment for later use.

Narva sits about 100km from Saint Petersburg - or about 62 miles.  What is the message that the US-NATO are sending to Russia?  How is Moscow supposed to receive this shot across their bow?

What if Moscow had a military unit like this along the US border with Canada or Mexico?  Do you figure it would be a big story on FOX News and CNN?